Python programming- List extend() and append()

Blogpump中想在中添加一个嵌套的为其子项,但是调用发现总是结果不对,才发现原来的调用有如此的差别。

1. (扩展) 与 (追加) 的差别
>>>li=['a','b']
>>>li.(['c','d'])
>>>li
['a', 'b', 'c', 'd']
>>>li.(['e','f'])
>>>li
['a', 'b', 'c', 'd',['e','f']]

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